Grinding wheel dressing device



my, H6. E, BRQCKER' 2,402,945

I GRINDING WHEEL DRESSING- DEVICE Filed Feb. s, 1944 a sheets-sheet 1 lfrown/EVS.

Fuy 2, i946, Y y l l E. BRocKER GRINDINGV WHEEL DRESSING DEVICE FiledFeb. 5. 1944* 2 sheets-sheet 2 Patented July 2, 1946 GRINDING WHEELDRESSING DEVICE Emil Brooker, Van Dyke, Mich., assignor to Super ToolCompany, Warren Township, Macomb County, Mich., a partnershipApplication February 3, 1944, Serial No. 520,913

This invention relates to grinding wheel dressing devices andparticularly to a dressing device which is remotely operated andadjustable to dress a surface on the grinding wheel which is disposedparallel or at an angle to the axis of the grinding wheel,

Difficulty has always been experienced when dressing a surface on theface of a grinding wheel which is disposed at an angle to the grindingwheel axis. Devices are provided in the trade for grinding suchangularly disposed faces but these all require manual manipulation ofthe dressing diamond, which often resulted in serious accidents to thefingers of the operator. The present invention embodies mechanical meansfor operating the dressing diamond which is located at a point remotefrom the face of the wheel so that the fingers of the operator neverapproach the wheel face.

The diamond is mounted on a block which is adjustable on a carriage to aforward, rearward or interjacent position. The carriage is mounted on adial plate which is angularly adjustable t a desired position by meansof a dial scale. One or more gears are provided within the platek foroperating a rack secured to the under side of the carriage. The gearsare driven through a pair of bevel gears from a shaft having a knobwhich is grasped by the hand of the operator and rotated to produce thelongitudinal movement of the carriage. The carriage is moved at theangie procured by the adjustment of the dial plate at a point remotefrom the position of the knob.

Accordingly, the main objects of the invention are; to provide adressing device for the face of a wheel which is remotely operated forpassing a dressing tool across the wheel face; to provide a dressingdiamond on a carriage which is adjustable to any angular positionrelative to the horizontal and operated along its longitudinal axisthrough the manipulation of a shaft remotely disposed to the carriage;to mount a dial plate on a shaft which may be adjusted and clamped inpredetermined position having a gear in engagement with a rack on acarriage supporting a diamond dressing tool which is movedlongitudinally with the carriage through the operation of the gear froma remote point; and in general to provide a device for dressing thesurface of a grinding wheel parallel or at an angle to the axis of thewheel, which is simple in construction, positive in operation, andeconomical of manufacture.

Other objects and features of novelty of this invention will bespecifically pointed out or will 2 Claims. (Cl. 125--11) become apparentwhen referring, for a better understanding of the invention, to thefollowing description taken in conjunction with the accompanyingdrawings wherein,

Figure l is a perspective View of a grinding wheel dressing deviceembodying features of this invention;

Fig. 2 is an enlarged sectional view of the structure illustrated inFig. l, taken on the line 2 2 thereof; A

Fig. 3 is a sectional view of the structure illustrated in Fig. 2J takenon the line 3 3 thereof;

Fig. 4 is a sectional View of the structure illustrated in Fig. 3, takenon the line d l thereof; Fig. 5 is a top plan view of the structureillustrated in Fig. 4 as viewed from lines 5 5 thereof and Fig. 6 is abroken side view of the structure illustrated in Fig. 1 in position todress the surface of a grinding wheel.

The dressing device embodies an L-shaped element having a base portionIU and a vertically disposed portion II at one edge provided in unitrelation as illustrated in the figures, or which maybe separate elementssecured together in a suitable manner. The portion I I contains anaperture I2 through which a shaft I3 is journaled, having a conicalbearing element It supported on the end by a nut I 5. The conicalbearing element Ill engages a conical aperture I5 in the portion I I andprovides a predetermined amount of friction to the rotation of theshaft.

The shaft portion Il extending from the opposite side of the portion IIis press tted into a dial plate I8 which rotates the shaft when theplate is turned. The plate has a top fiat surface 'I9' disposed as achord of the arc of the plate having a gib 2| machined along one of itsedges. A carriage 22 has a dovetailed element 23 secured thereto by aplurality of screws 24. A rack 25 is secured to the under side of thedovetailed element 23` by a plurality of screws 26. A reduced portion 21extends forwardly of the shaft Il in position to receive a gear 28, theteeth of which are in mesh with the teeth of the rack 25.

A pinion gear 29 is disposed in mesh With the gear 28 and is secured ona bolt 3l and to a beveled gear 32 by a nut 33. The beveled gear has atubular extending portion 34 which may be an integral part of thebeveled gear 32, as illustrated, or which may be a separate element. Thetubular portion 34 forms a bearing surface with the wall of the aperture35 through the vertical portion II. A pin 30 extends in the end of thetubular portion and in the gear to prevent their 3 relative movement. Anarcuate slot 36 is provided through the dial plate I8 through which thetubular element 34 extends and permits the plate to be adjusted aboutits center without interference.

A gib 4I is secured to the outer face of the plate I8 along the top flatsurface I9 by a plurality of screws 42. A shim 43 is disposed betweenthe gib and the outer surface of the doveta1 element 23 against which itis adjusted by a plurality of screws 44 which are retained in adjustedposition by nuts 45. Any wear which occurs between the gibs and thedovetail element is taken up by the adjustment of the screws 44v whichoperate to apply predetermined pressure to the shim 43, the dovetailelement and the gib 2|. A dial scale 46 is provided on the outer face ofthe vertical portion Il Ybeyond the area of the plate I8, as clearlyillustrated in Figs. 1 and 2. A clamping screw 41 is threaded into theedge of the portion II in engagement with a bar 48 as illustrated inFig. 4. The bar is made of brass or similar soft metal so as not todamage the outer surface of the conical element i5.

When the angle of the carriage 22 is to be adjusted, the screw 41 isloosened and the plate I8 is grasped by the operator and moved about itscenter until adjusted to the angular position desired. Thereafter thescrew 41 is turned to clamp the conical element I and the plate I8 inxed position. The carriage 22, as illustrated in Fig. 3, is providedwith an arcuate recess 49 which receives a. portion of a round bar 5Iwhich is secured in position by the plurality of bolts 24. A toolholding element 52 has an arcuate aperture 53 which receives theprojecting portion of the rod 5I over which the element may be adjustedand secured by a screw 54. A diamond dressing tool 55 is secured on theouter face of the element 52 by a screw 5B.

A cover 51 is secured to the outer face of the plate I8 by a pluralityof screws 58. A downwardly projecting guard plate 59 is secured to thecarriage along the outer side by screws 6I. A similar guard plate 62 isprovided at the rear and front ends of the carriage secured in positionby similar screws 6I. An arcuate guard plate 63 is mounted on the top ofthe vertical portion I I adjacent to the inner surface of the dial plateI8 to cover the aperture 36 when the plate is tilted and for preventingthe abrading particles from damaging the gib 2l and the under side ofthe carriage 22.

The beveled gear 32 is disposed in meshed relation with a beveled gear60 that is mounted on a rod 14 in a bearing sleeve 69 secured to a,block 13 which is attached to the base portion III by screws 64. The rodis secured to the gear 60 by a nut 15 and an operating knob 65 issecuredY to its opposite end by a screw 66. A shield '61 is mounted overthe gears 32 and 60, being secured in position by a plurality of screws68. In Fig. 6, a grinding wheel 10 is illustrated, having an angularlydisposed face 1I dressed thereon by the diamond tool 55 when thecarriage 22 is advanced forwardly and backwardly along its longitudinaldimension.

When such a surface is to be dressed on a grinding wheel, the screw 41is first loosened and the plate I8 is adjusted until the carriage 22 is`disposed. at the desired angle as read from the scale 46. The screw 41is then tightened and the tool holding element 52 may then be adjustedto a forward, rearward or other position on the rod 5I, depending uponthe position of the base portion I8 relative to the position of thegrinding wheel. Thereafter the knob 65 is rotated to operate the pinion29 through the pair of bevel gears 32 and 60 to drive the gear 28 andadvance and retract the rack and the carriage 22 along theirlongitudinal dimensions. This reciprocates the diamond dressing tool 55at a desired angle back and forth across the face 1I of the grindingwheel to dress the face to the desired angle. This is accomplished bythe operator at a point remote from the grinding wheel and the dressingtool, and the hazards attending such a dressing operation are therebyeliminated.

What is claimed is:

l. In a grinding wheel dressing device, a, base support, a horizontalshaft mounted thereon, a dial plate mounted on said shaft for adjustmentabout the axis of the shaft in a vertical plane, a gear on said shaft, acarriage on said plate having a rack in engagement with said gear whenmounted for movement on a tangent to a circle about said axis, a secondshaft mounted on said base support and extending through an arcuate slotin said plate, a gear on said second shaft in driving engagement withsaid first gear, and means for clamping said plate to said support forretaining it in adjusted position with the carriage tilted at adesirable angle relative toa horizontal plane.

2. In a grinding wheel dressing device, a base support, a horizontalshaft mounted thereon, a dial plate mounted on said shaft for adjustmentabout the axis of said shaft in a vertical plane, a gear on said shaft,a carriage on said plate having a rack in engagement with said gear whenmounted for movement on a tangent to a circle about said axis, a secondshaft mounted on said base support and extending through an arcuate slotin said plate, a gear on said second shaft in driving engagement withsaid first gear, means for clamping said plate to said support forretaining it in adjusted position with the carriage tilted at adesirable angle relative to a horizontal plane, and means by which saidsecond shaft is operated remotely from the plate for shifting saidcarriage on a tangent to said circle.

EMIL BROCKER.

